package com.example.bbs.filter;

import com.example.bbs.model.User;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

/**
 * @auther: zhangxin
 * @Description:
 */
public class LoginFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest req = (HttpServletRequest) servletRequest;
        HttpServletResponse resp = (HttpServletResponse) servletResponse;

        HttpSession session = req.getSession();

       Object obj = session.getAttribute("loginUser");
       if(obj != null && obj instanceof User){
           User user = (User) obj;
           filterChain.doFilter(req, resp);
       }else{
           resp.sendRedirect("login.jsp");
       }

    }
    @Override
    public void destroy(){

    }


}
